Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 210–250mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke250 mm
- Adjustable210–250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S
The AirTAC MBLCJ25X250-40S is a compact double-acting mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 245 N of push force and 206 N of pull force at 0.5 MPa. The 40 mm rear trimmer provides a usable end-position window of 210 to 250 mm, letting you dial in the exact travel distance for a 25 mm bore assembly.
This SKU includes a built-in magnet for CMSG, DMSG, or EMSG sensor switches. The riveted aluminum barrel and 20 µm hard-chrome plated carbon-steel rod provide durable service. The screw-tunable cushioning decelerates the rod near the stroke ends to absorb kinetic energy, protecting the end covers from impact damage during fast moves. The rear stopper sets the travel end but does not hold the load; an external guide is strongly recommended for this 250 mm stroke to prevent rod bending on the Ø10 mm rod.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 210–250 mm (trim 40 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 300 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -40 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S Is Used
PCB Drill Depth Setter
Uses the 210-250 mm window to fine-tune the Z-axis stroke on a drilling spindle carriage, relying on the 245 N push force to lower the bit assembly smoothly.
Packaging Flap Folder
Adjusts the rear stopper to time the folding stroke precisely for varying carton depths, while the air cushion slows the rod before impact to protect the cover.
Textile Loom Tensioner
Maintains yarn tension during high-speed weaving; the DMSG electronic sensor detects the rod position while the cushion absorbs the 250 mm travel energy.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S the Right Cylinder?
Step down to the 20 mm bore for lighter loads (157 N push at 0.5 MPa) or up to the 32 mm bore for heavier work (402 N push at 0.5 MPa). Choose this MBLCJ over the MBLJ when your cycle speed requires tunable end-of-stroke deceleration instead of a fixed rubber bumper, or over the MBLC when you need the 40 mm rear travel adjustment. The adjuster is a travel stop, not a lock; the cylinder will drift without live air pressure. Mounting is limited to Basic, FA flange, or LB foot brackets; SDB pivot or back-cover attachments are not available. The replacement match is 25 mm bore, 250 mm stroke, 40 mm adjust, G1/8 port, PT thread, and a built-in magnet.
Because the stroke is 250 mm on a Ø10 mm rod, side-load forces can cause premature seal wear and rod bending. Always use an external guide rail to support the payload and ensure the load axis stays true with the piston rod.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40S FAQ
At 0.5 MPa it provides 245 N push and 206 N pull force. At 0.7 MPa the push increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa.
The 40 mm adjustment is a rear travel stopper that limits the usable stroke window to 210-250 mm. The adjustable air cushion only decelerates the piston near the stroke ends. Neither mechanism locks or holds the load in place without continuous air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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